Abaixo está uma instrução que descreve uma tarefa de geração de SQL, combinada com uma entrada que fornece mais contexto sobre os esquemas de tabela disponíveis. Escreva o código SQL que responda adequadamente à solicitação
 ###Instrução: Quando foi construída a Hopperstad Stavkyrkje?
 ###Tabelas: CREATE TABLE the_sheets (the_sheets_id AUTO_INCREMENT PRIMARY KEY, Ecosystem VARCHAR, Date of issue VARCHAR, Place of issue VARCHAR, No. stamps in sheet INT, Face Value VARCHAR, Printer VARCHAR) CREATE TABLE season_goalscorers (season_goalscorers_id AUTO_INCREMENT PRIMARY KEY, Player VARCHAR, Career VARCHAR, Goals (Caps) VARCHAR, Pct. INT, Playing status VARCHAR) CREATE TABLE men's_singles (men's_singles_id AUTO_INCREMENT PRIMARY KEY, Seed INT, Rank INT, Player VARCHAR, Points INT, Points defending INT, Points won INT, New points INT, Status VARCHAR) CREATE TABLE churches (churches_id AUTO_INCREMENT PRIMARY KEY, Parish (Prestegjeld) VARCHAR, Sub-Parish (Sokn) VARCHAR, Church Name VARCHAR, Year Built VARCHAR, Location of the Church VARCHAR) CREATE TABLE new_zealand_track__&__field_championships (new_zealand_track__&__field_championships_id AUTO_INCREMENT PRIMARY KEY, Year INT, Place VARCHAR, Event VARCHAR, Performance VARCHAR, Age (years) INT)  
SELECT Year Built FROM churches WHERE Church Name = hopperstad stavkyrkje